Plutonium
The fallout of Ivy Mike contained two new elements which were then named einsteinium and fermium.
it was discovered in London, England.
Hydrogen was discovered.
Hydrogen was the first.
The artificial element curium (Cm).
The artificial radioactive element curium (Cm).
The lightest artificial isotope is hydrogen-3, also called "tritium". The lightest element that has no naturally occurring isotopes is technetium.
Einsteinium
einsteinium and fermium
The name of the artificial chemical element darmstadtium is derived from the name of the town Darmstadt (Germany) where this element was discovered.
einsteinium
Einsteinium